Decide what theory you want to use to analyze your case study. Choose a theory that you have discussed in class or that you are most familiar with. Read literature about how other researchers have applied this theory to a case study. Consult your professor or faculty adviser for guidance.
Identify the organization you would like to case study. Approach the head of the organization or department and obtain written permission. This permission contract should state where you are allowed in the organization, who you are allowed to talk to, what type of information you can include in your paper and how long the project will last.
Take extensive notes while inside the organization, but only when they're relevant to your theory. For example, if your theory focuses on the artifacts of the organization's culture then you don't want to take notes on what people are saying. Instead, you want to take notes on the documents and things people use on the job, and how people use them -- those things the theory defines as "artifacts."
Introduce your paper and the thesis statement, or claim what you will defend in your paper. Then spend extensive time explaining your case study to your audience. This includes explaining the background of the organization, any participant at the organization you might have interviewed or observed, and the reason you chose that organization.
Explain the theory you're applying to the case study. This should include any key concepts of the theory you intend to discuss. For example, if you are studying the artifacts of organizational culture then your paper should explain how the theory defines both "artifact" and "culture."
Explain what the theory says about the case study. If you take a critical theorist point of view, you might find that the organization is stuck in a rut, doing the same old thing. Apply specific parts of your theory to specific parts of your case study. This helps you explain what the theory says about that exact case study situation.
Detail why your analysis is important. This will relate back to your thesis statement. Since you should have proved it by now, explain why it's important that the thesis is true. Conclude the paper by detailing a few areas that need further research. Format the paper in APA style, the official guidelines of the Communication discipline.